[denonmarantz] Improve README (openhab#16767)

* Reformat table Markdown

Signed-off-by: Jacob Laursen <jacob-github@vindvejr.dk>

bundles/org.openhab.binding.denonmarantz/README.md

@@ -40,42 +40,42 @@ There are more parameters which all have defaults set.
 
 The DenonMarantz AVR supports the following channels (some channels are model specific):
 
-| Channel Type ID | Item Type | Description |
-|-------------------------|--------------|--------------|
-| _General_ | |
-| general#power | Switch (RW) | Power on/off
-| general#surroundProgram | String (R) | current surround program (e.g. STEREO)
-| general#artist | String (R) | artist of current track
-| general#album | String (R) | album of current track
-| general#track | String (R) | title of current track
-| general#command | String (W) | Command to send to the AVR (for use in Rules)
-| _Main zone_ | |
-| mainZone#power | Switch (RW) | Main zone power on/off
-| mainZone#volume | Dimmer (RW) | Main zone volume
-| mainZone#volumeDB | Number:Dimensionless (RW) | Main zone volume in dB (-80 offset)
-| mainZone#mute  | Switch (RW) | Main zone mute
-| mainZone#input  | String (RW) | Main zone input (e.g. TV, TUNER, ..)
-| _Zone 2_ | |
-| zone2#power | Switch (RW) | Zone 2 power on/off
-| zone2#volume | Dimmer (RW) | Zone 2 volume
-| zone2#volumeDB | Number:Dimensionless (RW) | Zone 2 volume in dB (-80 offset)
-| zone2#mute | Switch (RW) | Zone 2 mute
-| zone2#input | String (RW) | Zone 2 input
-| _Zone 3_ | |
-| zone3#power | Switch (RW) | Zone 3 power on/off
-| zone3#volume | Dimmer (RW) | Zone 3 volume
-| zone3#volumeDB | Number:Dimensionless (RW) | Zone 3 volume in dB (-80 offset)
-| zone3#mute | Switch (RW) | Zone 3 mute
-| zone3#input | String (RW) | Zone 3 input
-| _Zone 4_ | |
-| zone4#power | Switch (RW) | Zone 4 power on/off
-| zone4#volume | Dimmer (RW) | Zone 4 volume
-| zone4#volumeDB | Number:Dimensionless (RW) | Zone 4 volume in dB (-80 offset)
-| zone4#mute | Switch (RW) | Zone 4 mute
-| zone4#input | String (RW) | Zone 4 input
-
-(R) = read-only (no updates possible)
-(RW) = read-write
+| Channel ID  | Item Type  | Description  |
+|---------------------------|---------------------------|-----------------------------------------------|
+| _General_  | |  |
+| general#power | Switch (RW)  | Power on/off |
+| general#surroundProgram | String (R)  | Current surround program (e.g. STEREO) |
+| general#artist  | String (R)  | Artist of current track |
+| general#album  | String (R)  | Album of current track |
+| general#track  | String (R)  | Title of current track |
+| general#command | String (W)  | Command to send to the AVR (for use in Rules) |
+| _Main zone_  | |  |
+| mainZone#power  | Switch (RW)  | Main zone power on/off |
+| mainZone#volume  | Dimmer (RW)  | Main zone volume |
+| mainZone#volumeDB  | Number:Dimensionless (RW) | Main zone volume in dB (-80 offset) |
+| mainZone#mute | Switch (RW)  | Main zone mute |
+| mainZone#input | String (RW)  | Main zone input (e.g. TV, TUNER, ..) |
+| _Zone 2_  | |  |
+| zone2#power  | Switch (RW)  | Zone 2 power on/off |
+| zone2#volume  | Dimmer (RW)  | Zone 2 volume |
+| zone2#volumeDB  | Number:Dimensionless (RW) | Zone 2 volume in dB (-80 offset) |
+| zone2#mute  | Switch (RW)  | Zone 2 mute |
+| zone2#input  | String (RW)  | Zone 2 input |
+| _Zone 3_  | |  |
+| zone3#power  | Switch (RW)  | Zone 3 power on/off |
+| zone3#volume  | Dimmer (RW)  | Zone 3 volume |
+| zone3#volumeDB  | Number:Dimensionless (RW) | Zone 3 volume in dB (-80 offset) |
+| zone3#mute  | Switch (RW)  | Zone 3 mute |
+| zone3#input  | String (RW)  | Zone 3 input |
+| _Zone 4_  | |  |
+| zone4#power  | Switch (RW)  | Zone 4 power on/off |
+| zone4#volume  | Dimmer (RW)  | Zone 4 volume |
+| zone4#volumeDB  | Number:Dimensionless (RW) | Zone 4 volume in dB (-80 offset) |
+| zone4#mute  | Switch (RW)  | Zone 4 mute |
+| zone4#input  | String (RW)  | Zone 4 input |
+
+(R) = read-only (no updates possible),
+(RW) = read-write,
 (W) = write-only (no feedback)
 
 ## Full Example